The effects of flame treatment on the surface characteristics of four injection moulded, automotive grade, polypropylene samples, pigmented with carbon black, have been studied. The changes in wettability have been monitored by water contact angle and Dyne inks, whilst XPS has been used to establish the changes in oxygen surface concentration as a function of flame treatment. As expected carbon pigmented and carbon plus talc filled samples showed a significant increase in oxygen concentration and surface wettability with increasing flame treatment. For the glass filled sample this effect was not so pronounced. Inspection of the XPS valence band shows initial attack in the flame treatment process to be at the pendant methyl group of the poly(propylene) molecular architecture. XPS in conjunction with cluster ion bombardment shows the depth of surface treatment to range from ca. 7nm at one pass of flame treatment to some 15nm following seven passes. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) shows the segregation of characteristic additives during the injection moulding process which are subsequently greatly reduced during the flame treatment. As treatment level increases oxygen increases from mono-atomic to diatomic attachment. This work extends the understanding of the flame treatment of moulded polyolefines and establishes that the beneficial properties conferred are the result of the conjoint effect of the oxygenation of the bulk polymer along with the removal of surface segregated processing aids.
International Journal of Adhesion and Adhesives – Elsevier
Published: Dec 1, 2015
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera